Author: Eugene Nalimov
Date: 14:50:51 11/15/02
Go up one level in this thread
On hyperthreaded CPU two threads that decompress the data run exactly 2x faster than one thread. Thanks, Eugene On November 15, 2002 at 17:39:22, Robert Hyatt wrote: >On November 15, 2002 at 12:15:18, Gian-Carlo Pascutto wrote: > >>On November 15, 2002 at 12:10:44, Francesco Di Tolla wrote: >> >>>"Hyper- Threading Technology, which was pioneered on Intel's advanced server >>>processors, helps your PC work more efficiently by maximizing processor >>>resources and enabling a single processor to run two separate threads of >>>software simultaneously" >>> >>>I don't get the point: any modern cpu runs as many threads as it wants >>>simultaneously doing "context switching". >>> >>>Does this mean that in a Pentium two threads run at the same time in the CPU? >>>Then one would have "two CPU in one". >> >>That's the idea... >> >>But in practise it's more like 'one and a half CPU's in one' or even less :) >> >>-- >>GCP > >I think the only way this will look like "two cpus" is a special case... one >"thread" that fits into the trace cache (decoded micro-ops)." The other that >does a fair bit of memory accessing. The one that fits in the trace cache will >run at full-speed while the other will run at whatever speed memory bandwidth >will allow... > >For chess, that isn't likely going to happen, although as the trace cache idea >grows and it gets larger, this might happen...
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